Sweating the small stuff: Smartwatch developed at UCLA measures key stress hormone

A UCLA research team has developed a device that could be a major step forward: a smartwatch that assesses cortisol levels found in sweat — accurately, noninvasively and in real time. Described in a study published in Science Advances, the technology could offer wearers the ability to read and react to an essential biochemical indicator of stress.This device opens new possibilities for personal health monitoring.

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